package org.example.jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class JDBCLogin2 {
    public static void main(String[] args) {
        try (Connection connection=DBUtil.getConnection();){
            //接收用户输入
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入用户名:");
            String username = scanner.nextLine();
            System.out.println("请输入密码:");
            String password = scanner.nextLine();
            //1.创建预编译SQL的执行对象;
            String sql="SELECT nickname FROM user WHERE username=? AND password=?";
            PreparedStatement ps=connection.prepareStatement(sql);
            //2.设置占位符?的值
            ps.setString(1,username);
            ps.setString(2,password);
            //3.执行SQL语句
            ResultSet rs=ps.executeQuery();
            if (rs.next()) {
                String nickname = rs.getString("nickname");
                System.out.println("恭喜你:" + nickname + " 登录成功");
            } else {
                System.out.println("用户名或密码错误");
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }
}
